Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions		Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance at Dec. 31, 2020		$ 1,534	$ 0	$ 11,259	$ (428)	$ (9,038)	$ (259)
Beginning balance (shares) at Dec. 31, 2020			647				9
Net loss		(1,177)			(1,177)
Other comprehensive income		78				78
Common stock issued for employee equity awards	[1]	3		23			$ (20)
Common stock issued for employee equity awards (shares)	[1]		2				1
Government grant warrant issuance		44		44
Ending balance at Mar. 31, 2021		482	$ 0	11,326	(1,605)	(8,960)	$ (279)
Ending balance (shares) at Mar. 31, 2021			649				10
Beginning balance at Dec. 31, 2021		3,887	$ 0	11,447	(148)	(7,130)	$ (282)
Beginning balance (shares) at Dec. 31, 2021			650				10
Net loss		(940)			(940)
Other comprehensive income		59				59
Common stock issued for employee equity awards	[2]	(15)		15			$ (30)
Common stock issued for employee equity awards (shares)	[2]		2				1
Ending balance at Mar. 31, 2022		$ 2,991	$ 0	$ 11,462	$ (1,088)	$ (7,071)	$ (312)
Ending balance (shares) at Mar. 31, 2022			652				11

[1] Treasury shares were withheld for payment of taxes, at a weighted average price per share of $38.35 in the March 2021 quarter.

[2] Treasury shares were withheld for payment of taxes, at a weighted average price per share of $41.00 in the March 2022 quarter.